A selection of new science articles from the past week of interest to the SPARC community (a SPARC Office choice).

The Influence of Obliquely Propagating Monsoon Gravity Waves in the Southern Polar Summer Mesosphere after Stratospheric Sudden Warmings in the Winter Stratosphere. By D. Alexandre et al. in the Journal of Geophysical Research: Atmospheres.

Variation in the Holton–Tan effect by longitude. By D. Elsbury, Y. Peings, and G. Magnusdottir in the Quarterly Journal of the Royal Meteorological Society.

Improved Circulation in the Northern Hemisphere by Adjusting Gravity Wave Drag Parameterisations in Seasonal Experiments with ICON‐NWP. By R. Köhler et al. in Earth and Space Science.

Potential of future stratospheric ozone loss in the midlatitudes under global warming and sulfate geoengineering. By S. Robrecht et al. in Atmospheric Chemistry and Physics.

Aerosols in current and future Arctic climate. By J. Schmale, P. Zieger, and A.M.L. Ekman in nature: climate Change.

Sensitivity of stratospheric water vapour to variability in tropical tropopause temperatures and large-scale transport. By J.W. Smith et al. in Atmospheric Chemistry and Physics.

Quasi-coincident observations of polar stratospheric clouds by ground-based lidar and CALIOP at Concordia (Dome C, Antarctica) from 2014 to 2018. By M. Snels et al. in Atmospheric Chemistry and Physics.